2010 GMC Acadia Owner's Manual - Page 387

Vehicle Care 10-71 { WARNING Rust or dirt on a wheel, or on the parts to which it is fastened, can make wheel nuts become loose after time. The wheel could come off and cause an accident. When changing a wheel, remove any rust or dirt from places where the wheel attaches to the vehicle. In an emergency, use a cloth or a paper towel to do this; but be sure to use a scraper or wire brush later, if needed, to get all the rust or dirt off. See If a Tire Goes Flat on page 10‑57. 7. Place the jack under the vehicle as identified in Step 4. Raise the vehicle by turning the lug wrench clockwise in the jack. Raise the vehicle far enough off the ground so that there is enough room for the spare tire to fit under the wheel well. 8. Remove all the wheel nuts and the flat tire. 9. Remove the plastic spare tire heat shield by pulling the rubber latch. Store the plastic spare tire heat shield. See "Storing a Flat or Spare Tire and Tools" later in this section for more information.